[ltp] Horizontal interrupt

Daniel linux-thinkpad@linux-thinkpad.org
Sun, 23 Sep 2007 15:27:34 +0200


On Sat, Sep 22, 2007 at 02:49:00PM -0400, bhaskins@chartermi.net wrote:
> Plenty enough time for this application.
> I am trying to interface a expensive fish finder/depth finder to any 
> one of my many Thinkpads.
> I have the A/D interface hooked up to my printer port and that part is
> working fine except that the display is somewhat ragged because the
> transmit control is not in sync with the display.

Ok, I see what you are trying to do, but I cannot see the benefit of it.
Why don't you just build an image from the data you get on your parallel
port and display it once it is complete? Or if that would take too long,
why not display a partial image every time you have built a new row of
your image, with the not-yet-transmitted lines displayed in
black/white/whatever?

Daniel
-- 
What men are poets who can speak of Jupiter if he were like a man, but
if he is an immense spinning sphere of methane and ammonia must be silent?
	-- Richard P. Feynman